Mortising-machine.



J .1 UARLSON. MORTISING MAOHINB. APPLICATION 111.1111 111:0. :11, 1911.

1,096,599, Patented May 12, 1914.

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MORTISING MACHINE. APPLIOATION FILED D110. 21, 1911. v 1,096,599. Patented May 12, 1914.

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' mer ts 30 drawings forming a 50 bers 2 of of-the parallel side pieces 4 and. the transnnirnn srAT-Es IPA-TENT orrioa a onnbcannson, or roarmnn, OREGON.

Bait at I, :JorIN, CARLSQN; a "dmen Ofmhe n M-Stateai'and a resident of; the-city of Por;tland,, eountyl'of"Multno: '5 mah,,-; an- 1 State of Oregon, have invented certain I new 1 and; useful Improvements" in I 'Mortising-Machines of which the following 5 isasp'ecification.

My invention relatestp improvements in tojthe so cal-led .ha'nd "morti'sing machines,

Land has for-"its object the {production of a anachine of: this character through the medi- ,-u'm of'which al hole-ofrectangular,' square, orgother polygonal formats be formed as as a clrcul'ar thole."

readilfy, i 1 A urther object-is the production ofpa maehineol this character which be of durable" and. economical construct on, rone cienc' in use. n Ot er objects will appear hereinafter,-- 'Withuthese objects inview my lIlVQIltlOII ('25 consists in thefcom-binations andv arrange- I ofparts hereina'fter'described and claimedi". 7,

My ,invention will be more readily underi I v i I i v I l 3 peciflcation (it-Letters Patent. asp rat o mean tsmter 21, 1911. Serial no. eeaosa if) mortising machines and morefparticularlyc 2 ,o' which may be'readily and easily manipu stood by reference to l the. accompany ingtion,"and in which 3 Y L *Figure 1 lsa front elevat on of a mortispart ofithis ispecifica' l .7 *guide members. 1 'Ihearrangement.is such,

as will be observed, that. the bar=8 willbe between the frame sides 2,

ing'machine embodying my invention, Fig.

2 'is'a sideelevation thereof, Fig, 3 1s a line; X- -X of Fig. i 1, andFig, ,4- is fan onlargedtsectional' detail side elevation of the cutlter chain and the support therefor. 1 ?he p i 40 illustrated in the drawings comprises an in referred form of construction as verted substantially U-shaped frame 1 havbeing ,formed preferably of metal. The

- sidemembers 2 are reinforced at intervals by' crosspieces 3which extend between the,

same at the rearward edges 'thereof,;a handleuQr' grip 4 being rovided at'the-uppe'r end of the frame rigidly scoured thereto.

Slidably'mounted between the slde'memthe frame'l is a carrier consisting versal connecting bars 4 w hich rigidly connect the-members4. The latter are prov ded at their outer sides "with dove tail tongues- 5 which slidably engage correspondingly 35 'transverse' section taken on substantially ing theparallel side vmembers 2, said frame Patented M "12; 1914-1 tion thereof in the adjacent inner sides of a the frame members atthe .lower end thereof is a shaft 6, the

or: the "centralsection as clearly shown in Flgll.

" Arrangedmedially between. theylowe 'i ends ofthe'i rame'sic'le members 2 is an elon- .-.are" adjustably connected by means of the -for effecting longitudinal adjustment of gated bar 8 consisting of two sections which" formed gl rooves l'f provided forthe recep} J 2, as cle'arly shown in j. a Fig; 3. Rotatably mounted in the carrier. c0

l'atterbeihg ofa sectional character com .prisihg preferably 3 sections, the inner i ends oi the outer sections being detachably 'comlected" at 7 a with the respective ends I said bar, as will be readily understood. The

upper end of said; bar 8 loosely embraces the central section of the shaft (3, the lower end of said --bar being positioned between .the U-jsh'aped guide members 10 which 6111- 3', brace thellater'al edges of said bar,, said guide members being ad-justably secured in proper position by means of threaded stems ll which "are threaded inthe frame members 2 at the lower ends thereof, as clearly 'shownin 1, the"outer ends of said stems being provided with heads for effecting ready rotation and hence adjustment of said held "centrall free lqngitu inal movement thereof being however permitted. Arranged atthe upper end of the bar 8 and mounted upon the shaft ,6 is a sproeket wheel 12,'s'aid end of said bar being bifurcated to accommodate said sprocket wheel." Mountedat the bifurcated lower end'of said bar is another sprocketwheel 13 around which and-.the sprocket wheel 12 passes asprocket chain 14. The

arrangement is such, as is evident, that feedmovement 'of" said chain to out while surface a tiled.

All of said cutter blades are of the carrier is a trans ersely extending shaft 16 upon one end of which is carried a pinion 17 meshing with a rack'lS formed upon the adjacent edge of the adjacent frame member 2. This arrangement is such that the rotation of the shaft 16 imparts a similar motion to the pinion 17 and causes a longitudinal movement of said carrier within the frame 1, the rotation of the pinion coEipera-ting with the rack 18 to create this motion. Rotatably mounted in said carrier intermediate the shafts 6 and 16 is a transversely extending counter shaft 19. eratively connected with the shaft 16 by means of a sprocket chain 20 which passes round coplanar sprocket wheels 21 and 22 mounted respectively upon said shafts. One end of the shaft 19 projects laterally from the frame 1, a gear 23 beiugmounted thereon. Said gear meshes with a pinion 24 carried upon the corresponding laterally projecting end of the shaft 6, so that rotation of said shaft will beeli'ected upon ro- 'erative connection is tation of said gear. Secured to the gear 23 is a crank handle 25 whereby said gear may be readily manually rotated. The construction is such then as will be seen that an opestablished between the crank handle and the shafts 6 and 16 and so that, upon rotation of said crank handle; rotation of the cutter chain 18 and movement thereof bodily longitudinally of the frame 1 will be simultaneously effected.

In using the tool, thehandle '4? thereof is grasped by one hand and the handle 25 by the other. The lower end of the tool is then positioned and held securely against the surface in which the mortise is to be formed and the handle 25 rotated in the proper direction. Upon rotation of said handle the cutter blades will be brought into engagement with the adjacent surface effecting the cutting thereof as desired. B reason of the sectionalconstruction of theshaft 6 the sprocket chain and the parts connected therewith may be readily disconnected from the device by disconnection of the central section of said shaft, so that a cutter of another formor dimensions maybe employed if desired.

The shaft 19 is opmay be readily carried about in a tool'chest, 21116 the same is efficient in operation.

While I have illustrated and described the preferred construction for carrying my invention into effect this is capable of variation and modification without departing from the spirit of the invention. I therefore do not wish to be limited to the exact details of construction set forth but desire to avail myself of such Variations and modifications as come within the scope of. the ap pended claims. 1

Having descri ters Patent is:

1. In a device of the class described, a.

main frame, a carrier slidably mounted therein, a bar carried by said carrier, sprocket wheels arranged adjacent the ends of said bar, a cutter chain arranged on said wheels, means for imparting motion to said chain and means for guiding the lower end of said bar, said means comprising itshaped jaws adapted to engage the opposite sides of said bar, and stems on said jaws threaded into the opposite sides-of the lower end of said frame. v

2. In a device of the class described, a frame, a carrier slidably mounted in said frame, a shaft rotatably mounted inwsaid carrier and comprising a pair of end sections j ournaled in said carrier and a central detachable section, a sprocket wheel fixed to said central section, a bar having a perfo rated end embracing the central section of said shaft adjacent said wheel, a second sprocket wheel arranged at the free end of said bar, a cutter chain arranged on said wheels and means for imparting motion to said shaft, substantially as described.

3. In a device of the'class described, an inverted Ushaped frame, a carrier slidably 'mounted therein, a shaft rotatably mounted in said carrier, means for imparting rota tion to said shaft, a sprocket Wheel on said shaft, a bar having perforated end embracing said shaft, a sprocket Wheel arranged adjacent the free end of said bar, and a laterally adjustable guide for the lower end of said bar comprising a pair of U-shaped jaws adapted to embrace the sides of said bar, and stems on said jaws threaded into the lower ends of said U-shaped frame, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. o

' JOHN CARLSON.

\Vitnesses:

CHAS. JOHNSON, JOHN HAGBUND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

bed my invention what I claim as new and desire to secure by Let- 

